OAD

Oad or OAD may refer to:

Science and technology

 * Auditory processing disorder or obscure auditory dysfunction (OAD), an auditory condition
 * Object-oriented analysis and design, a software engineering approach
 * Office of Astronomy for Development, an office of the International Astronomical Union
 * Open Access Directory, founded by Peter Suber and Robin Peek
 * Original Acquisition Disk, in digital forensics

Other uses

 * Original animation DVD, an anime release bundled with its source-material manga
 * Oad (caste), a social group of South Asia
 * Oad language, an Indo-Aryan language
 * Oad Street, a hamlet in Kent, England
 * Oad Swigart (1915–1997), American baseball player
 * Ordo Augustiniensium Discalceatorum, a Catholic religious order
 * Oxford American Dictionary